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xen-devel
[Xen-devel] Re: [bisected] 2.6.31 regression: fails to boot as xen guest
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To: |
Ingo Molnar <mingo@xxxxxxx> |
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Subject: |
[Xen-devel] Re: [bisected] 2.6.31 regression: fails to boot as xen guest |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Tue, 25 Aug 2009 11:30:17 -0700 |
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Cc: |
"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Arnd Hannemann <hannemann@xxxxxxxxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Pekka Enberg <penberg@xxxxxxxxxxxxxx>, "hannes@xxxxxxxxxxx" <hannes@xxxxxxxxxxx>, Arnd Hannemann <Arnd.Hannemann@xxxxxxxxxxxxxxxxxxx>, "torvalds@xxxxxxxxxxxxxxxxxxxx" <torvalds@xxxxxxxxxxxxxxxxxxxx> |
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Tue, 25 Aug 2009 11:31:42 -0700 |
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<20090825182510.GA6903@xxxxxxx> |
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<4A9407B1.6020400@xxxxxxxxxxxxxxxxxxx> <84144f020908250929t7d4a74f1n4827de04e5c4c56a@xxxxxxxxxxxxxx> <4A94161A.2020609@xxxxxxxxxxxxxxxxxxx> <1251219129.4852.1.camel@penberg-laptop> <4A94242E.30309@xxxxxxxxxxxxxxxxxxx> <1251223399.13451.5.camel@penberg-laptop> <4A942BDD.70303@xxxxxxxxxxxxxxxxxxx> <20090825182510.GA6903@xxxxxxx> |
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On 08/25/09 11:25, Ingo Molnar wrote:
> * Arnd Hannemann <hannemann@xxxxxxxxxxxxxxxxxxx> wrote:
>
>
>> Pekka Enberg wrote:
>>
>>> On Tue, 2009-08-25 at 19:49 +0200, Arnd Hannemann wrote:
>>>
>>>> Hi Pekka,
>>>>
>>>> Pekka Enberg wrote:
>>>>
>>>>> On Tue, 2009-08-25 at 18:49 +0200, Arnd Hannemann wrote:
>>>>>
>>>>>>> Thanks for doing the bisect! Can we also see your .config
>>>>>>> also?
>>>>>>>
>>>>>> Config for -rc7 is attached. My bisect configs were based on
>>>>>> that
>>>>>>
>>>>> Thanks! While we wait for the Xen people, you can try the
>>>>> following patch to see if we can narrow the bug down to
>>>>> trap_init().
>>>>>
>>>> Yes seems to be trap_init(). -rc7 with this patch applied boots up
>>>> to the prompt.
>>>>
>>> Thanks for testing! Ingo, what do you think of the following patch?
>>> AFAICT, x86-32 is the only architecture playing with traps in
>>> mem_init() so this should be the safest fix for 2.6.31.
>>>
>> Hmm, -rc7 + this fix does not work for me :-/
>> Still hangs before any output...
>>
> does earlyprintk=vga tell you anything about precisely where it
> hangs?
>
It's a Xen domain, so it should be earlyprintk=xen
J
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